Muffler.



S. D. WALDON.

MUPFLER. APPLICATION FILED 111111.16, 1911.

Patented Apr. 21, 1914 UNITED STATES PATENT OFFICE.

SIDNEY D. WALDON, OF DETROIT, MICHIGAN, ASSIGNOB. TO PACKARD MOTOR CARCOMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

MUFFLER.

To all Iwhom, it may concern.'

Speclcatiou of Letters Patent.

Application led March 16, 1911.

Patented Apr. 21, 1914. serial No. 614.9:

ber 12.l thus being further broken up and Be it known that l, SlDNY D.lVALooN, i passed into the annular space between the a citizen of theUnited States, and residentof Detroit, Wayne county, State of Michi`gan, have invented certain new and 'useful Improvements in Mulders, ofwhich the following is a specification.

This invention relates to mulilers and particularly to mutllers for usewith multicylinder internal combustionengines.

An object of the invention is to make a muffler of simple andinexpensive construction, one that is easy to assemble and to repair andone that will cushion thc gases haust pipe secure to the tubular membersand the and cause them to be broken u and finally expelled in a more orless stea y stream, at the same time with little or no back pres sure. l

Other objects will appear from the following specitcation taken in-connection with the drawings, in which, Figure 1 is a longitudinalsection through a mufller embodying the invention, and Fig. 2 is a crosssection on the line 2-2 of Fig. 1.

Referring to the drawings, it will be seen that the mutller consists ofan outer cylindrical casing 10 which is preferably lined with asbestosas' shown at 11, an outer tubular member 12 concentrically arrangedwithin the casing, an inner tubuiar member 13 concentrically arrangedwithin the first or tu hular member 12, and end plates 14 and 15 whichlose the. ends of the tubular members of the casing excepting theforward end of the inner tubular member 13 which projects through theend plate 14 and is provided with a coupling member 16 by which it maybe attached to the motor ex- The end plates 14 and 15 are casing by thestay rods 17, three of these rods being shown in the drawings, and theserods are preferably arranged ongitudinally in the annular space- 18between the outer tubular member 12. and the casing 10.

The inner tubular member 13 is provided adjacent its forward or inletend with mveral series of perforations 19 through which the exhaustgases escape from the cylindrical member j13 into the outer cylindricalmember 12. From 'here the gases pass thr ugh Several series ofperforations 20 in the rearward end of the outer tubular meml i l whichmay extend throughout a portion of the length' of the muler and insideofthe easing 10. This outlet tube 21 passesthrough :i suitable openingin the end plate 15 and may be provided with an extension 22 extendingrearwardly therefrom for the purpose of discharging the gases at asuitable omt.

It will he understood that the gases pass` ingr from the motor exhaustpipe into the inner tubular member13 will becushioned by the air orothergas in the member between the perforations 19 and thorearward endthereof,and the gases will then take a circuitou's passage through theopening 19, rearwardly through the member 12 and out through theopenings 20, thence forwardly again through the annular space 18 betweenthe member 12 and the casing 10 and finally passing outward through theoutlet pipe 21 and its extension 22.

It will also he understood that the inner member 13 ma \v be removed bytaking out the bolts 23 in the forward end thereof and the bolt 24 inthe rear` without dismantling the remainder` of the muier. Also theentire mufller may be dismantled by removing the three rods 17 and bolt24, and as easily reassembled.

Having thus described my invention,V

Q 1,094, los

forated adjacent said exhaust pipe connec- In testimony whereof I aix mysignature tion end only, said tubular outer membei` l in the presence oftwo Witnesses.

being perforated adjacent the o posite end l A' only, end platesabutting agninstpthe ends 0f SIDNEY WALDON' said elements and saidcasing and rod's coni Witnesses: necting the end plates and passingbetween g W. H. FINCKEL, Jr., said elementsv l RICHARD E. MAnsToN.

